Garmin 255A manual Getting Started, Product Description

1 GETTING STARTED

1.1Product Description

Combining a powerful VHF communications transceiver with 200 channel VOR, Localizer and Glideslope receivers, the GNC 255 provides a full-functioned navigation and communications solution in a small footprint at a very affordable price. Besides traditional Nav/Com features, the GNC 255 also incorporates workload-reducing functions such as automatic decoding of the Morse code station identifier for VOR/LOC, most-used frequency storage in memory, built- in course deviation indicator, and more.

The GNC 255 has the ability to monitor the standby Com frequencies. The GNC 255’s Com radio operates in the aviation voice band, from 118.000 to 136.975 MHz, in 25 kHz steps (default). For European operations, a Com radio configuration of 8.33 kHz steps is also available. The GNC 255 VHF Nav receiver operates from 108 MHz to 117.95 MHz decoding both the VHF Omni Range and Localizer navigation signals. The built-in Glideslope receiver will automatically tune the corresponding glideslope paired frequencies (328 MHz to 335 MHz) when the localizer is tuned. The GNC 255 is available in 10 and 16 watt com transmitter versions. The GNC 255A is available with a 10 watt com transmitter. The GNC 255B is available with a 16 watt com transmitter.

Photo Sensor

Power On/Off,

Com Volume,

Squelch On/Off

Nav (VLOC)

Volume, Nav ID

On/Off

Frequency

Monitor Key

Com or Nav

Frequency Selection

OBS Selection

To/From Selection

Locking			Frequency Transfer
	Screw		(FLIP/FLOP) Key
								USB Port
						LARGE and
						SMALL Knobs
							(Frequency
						Adjust)
					Enter Key
				Clear Data Key
		Function Selection

Figure 1-1 GNC 255 Front Panel Description

190-01182-01 Rev. A Garmin GNC 255A/255B Pilot’s Guide 1-1